Nice shots Andy.
Re the 35-350,its one I have been trying out lately on a 1d,and the pair of them together is sooo heavy,a monopod definately needed for sharp shots imho.
I am normally a Nikon man,but have been tempted to the white side by a chance to use this set up.
When I go to do bird photography everyone and his dog seems to have 500mm primes ,usually white,but the 100-400 are popular as walk round lenses.
Pons